| 摘要 |
<p>A vacuum rotary dryer capable of charging solids into a rotary drum and discharging the solids from the rotary drum without the need of touching the solids. Mounted to the rotary drum (23) are a gas communication pipe (46) and a solid supply and discharge pipe (56). The solid supply and discharge pipe (56) is connected to a solids supply source, and a pressure reducing device (53) reduces pressure in the rotary drum through the gas communication pipe (46) to supply solids to be dried into the rotary drum (23). After the solids are dried in the drum, the solid supply and discharge pipe (56) is connected to a solid sucking and conveying device to open the gas communication pipe (46) to the atmospheric pressure. In a state, in which the rotary drum (23) is inclined, a revolving portion (56b) provided on the solid supply and discharge pipe (56) is made to revolve to enter into the solids to suck the solids from a tip end of the revolving portion for discharging. Finally, the tip end of the revolving portion (56b) is made to face the lowermost portion of the rotary drum to discharge almost all the solids in the rotary drum.</p> |
